M5 Atom Echo - no voice

I’ve bought two M5 Atom Echo units now, both came with firmware, the buttons work, the LED’s work, they listen to audio and HA acts on the speech… but no sound feedback.

compilation_time “Feb 22 2024, 22:07:13”

I’ve noted in the debug section that there are entries for…

Light
Button
Switch (0 and 1)
Binary sensor

…but nothing for speaker?
I have two ReSpeaker Lite and they are working with speech feedback, which led me to believe that the original Echo unit was faulty… which was why I bought the second one.

But now I’m starting to think that maybe there is an issue with my HA installation running on a Pi5?

    "version": "2024.11.3",
    "dev": false,
    "hassio": true,
    "virtualenv": false,
    "python_version": "3.12.4",
    "docker": true,
    "arch": "aarch64",
    "timezone": "Europe/London",
    "os_name": "Linux",
    "os_version": "6.6.31-haos-raspi",
    "supervisor": "2024.11.4",
    "host_os": "Home Assistant OS 13.2",
    "docker_version": "27.2.0",

Grateful for thoughts.